The members who posted before me all give excellent choice, I just wanna add
Doraemon if you're looking for anything playful.
It's about a robotic cat that come from the future to save a clumsy kid named Nobita from his future failures. He have a bunch of cool gadgets that he lend Nobita to help him get out of sticky situation. But in some cases, it only create more trouble for Nobita (as Nobita is a clumsy idiot who's slow on learning). I highly recommend it.
Oh, and
Tenjou Tenge. Think high school setting combined with Street Fighter. 'nuff said.
If that didn't work for you, ALL the female character in Tenjou Tenge have enormous boobies
